Errors notifications under pull requests (#2081)

* Added error comments under pull requests

* updating DIRECTORY.md

Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>

.github/workflows/codespell.yml

@@ -12,3 +12,6 @@ jobs:
       - run: |
           SKIP="./.*,./other/dictionary.txt,./other/words,./project_euler/problem_22/p022_names.txt"
           codespell -L ans,fo,hist,iff,secant,tim --skip=$SKIP --quiet-level=2
+      - name: Codespell comment
+          if: ${{ failure() }}
+          uses: plettich/python_codespell_action@master

.travis.yml

@@ -5,6 +5,8 @@ python: 3.8
 cache: pip
 before_install: pip install --upgrade pip setuptools six
 install: pip install black flake8
+notifications:
+    webhooks: https://www.travisbuddy.com/
 before_script:
   - black --check . || true
   - flake8 --ignore=E203,W503 --max-complexity=25 --max-line-length=120 --statistics --count .

DIRECTORY.md

@@ -72,6 +72,9 @@
   * [Huffman](https://github.com/TheAlgorithms/Python/blob/master/compression/huffman.py)
   * [Peak Signal To Noise Ratio](https://github.com/TheAlgorithms/Python/blob/master/compression/peak_signal_to_noise_ratio.py)
 
+## Computer Vision
+  * [Harriscorner](https://github.com/TheAlgorithms/Python/blob/master/computer_vision/harriscorner.py)
+
 ## Conversions
   * [Decimal To Binary](https://github.com/TheAlgorithms/Python/blob/master/conversions/decimal_to_binary.py)
   * [Decimal To Hexadecimal](https://github.com/TheAlgorithms/Python/blob/master/conversions/decimal_to_hexadecimal.py)
@@ -350,6 +353,7 @@
   * [Monte Carlo](https://github.com/TheAlgorithms/Python/blob/master/maths/monte_carlo.py)
   * [Monte Carlo Dice](https://github.com/TheAlgorithms/Python/blob/master/maths/monte_carlo_dice.py)
   * [Newton Raphson](https://github.com/TheAlgorithms/Python/blob/master/maths/newton_raphson.py)
+  * [Number Of Digits](https://github.com/TheAlgorithms/Python/blob/master/maths/number_of_digits.py)
   * [Numerical Integration](https://github.com/TheAlgorithms/Python/blob/master/maths/numerical_integration.py)
   * [Perfect Square](https://github.com/TheAlgorithms/Python/blob/master/maths/perfect_square.py)
   * [Pi Monte Carlo Estimation](https://github.com/TheAlgorithms/Python/blob/master/maths/pi_monte_carlo_estimation.py)
@@ -375,6 +379,7 @@
   * [Softmax](https://github.com/TheAlgorithms/Python/blob/master/maths/softmax.py)
   * [Square Root](https://github.com/TheAlgorithms/Python/blob/master/maths/square_root.py)
   * [Sum Of Arithmetic Series](https://github.com/TheAlgorithms/Python/blob/master/maths/sum_of_arithmetic_series.py)
+  * [Sum Of Digits](https://github.com/TheAlgorithms/Python/blob/master/maths/sum_of_digits.py)
   * [Test Prime Check](https://github.com/TheAlgorithms/Python/blob/master/maths/test_prime_check.py)
   * [Trapezoidal Rule](https://github.com/TheAlgorithms/Python/blob/master/maths/trapezoidal_rule.py)
   * [Volume](https://github.com/TheAlgorithms/Python/blob/master/maths/volume.py)